Number three is the black rhinoceros.

第三种是黑犀牛。

Black rhinos may have already lost one of its subspecies, the West African black rhinoceros, due to extinction.

黑犀牛可能已经失去了它的一个亚种，西非黑犀牛，它已经灭绝了。

Take, for example, the west African black rhinoceros, one recent species that we drove to extinction.

以西非黑犀牛为例，它是我们最近导致灭绝的物种之一。